• JOYANTA BIR

      Articles written in Journal of Earth System Science

    • Chlorophyll-a, SST and particulate organic carbon in response to the cyclone Amphan in the Bay of Bengal

      MD RONY GOLDER MD SHAHIN HOSSAIN SHUVA MUHAMMAD ABDUR ROUF MOHAMMAD MUSLEM UDDIN SAYEDA KAMRUNNAHAR BRISTY JOYANTA BIR

      More Details Abstract Fulltext PDF

      This study aims to explore the variation of Chlorophyll-a(Chl-a), particulate organic carbon (POC) and sea surface temperature (SST) before (pre-cyclone) and after (post-cyclone) the cyclone Amphan in the Bay of Bengal (BoB). Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite level-3 data were used to assess the variability of the mentioned parameters. Chl-a concentration was observed to be significantly (t = −3.16, df $\approx$ 18.03, p = 0.005) high (peak 2.30 mg/m$^{3}$) during the post-cyclone period compared to the pre-cyclone (0.19 mg/m$^{3}$). Similarly, POC concentration was significantly (t = 3.41, df $\approx$ 18.06, p = 0.003) high (peak 464 mg/m$^{3}$) during the post-cyclone compared to the pre-cyclone (59.40 mg/m$^{3}$). Comparatively, high SST was observed during the pre-cyclone period and decreases drastically with a significant difference (t = 14, df = 33, p = 1.951e-15) after the post-cyclone period. The results indicated an increase in Chl-a (502%) and POC (240%) with a positive anomaly of 0.55 and 94.11 mg/m$^{3}$, but a decrease in SST (8.52%) with a negative anomaly of 2.7$^{\circ}$C in the BoB.

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